Preheat your oven to 425°F (220°C). Gather your ingredients and equipment.

Slice the bacon into 1-inch pieces and heat a skillet over medium-low heat. Cook for about 5 minutes until crispy.

Add diced sweet onion and brown sugar to the bacon, cooking for 7-10 minutes until onion is transparent.

Whisk together egg and water in a bowl for the egg wash, setting aside.

Roll out the puff pastry to about 1/8 inch thick, cut into six equal squares, and place on parchment-lined baking sheet.

Spoon red pepper jelly onto each pastry square, followed by the bacon and onion mixture, then add a slice of brie.

Brush edges with egg wash, fold squares in half, and press edges with a fork to seal.

Brush tops with egg wash and bake in preheated oven for 15-20 minutes until puffed and golden.

Let cool for a few minutes on the baking sheet before serving.